Metallic-diaphragm pump.



K. STEINBECKER. METALLIC DIAPHRAGM PUMP.

PPPPPPPPPPPPPPPPPPPPPPPPPP 1.

1,085,306, Patented Jan 27, 1914.

A@ le Misses: Karl bHMQw-L KARL STEINBECXEB, 0E CHARLOTTENBURG, GERMANY, ASSIGNOR TO GENERAL ELEGTRIC CQMPANY,

A. CORPORATION OF NEW YORK.

MEDALlICLDIAPHRAG-M PUMP.

Speci'uatt'cn 011 Letters Patent.

PatentedJan. 27, 1914.

Agloatmn filed September. 7, 1.911.. Serial No. M013.

To all 'whom fit may concern:

Be it known that I, KARL STEINBECKEB, a subject of the King of Prussia, residing at Charlottenburg, Germany, have invented certain new and useful Improvements 1n Metallic-Diaphragm Pumps, of which the following is a specification.

This invention relates to pumps fon fore ing very small quantities of iuid-as to the fuel injectors or atomizers of internal combustion enginesin which theI suction and delivery are eii'ected by the uctuations of a metallic diaphragm Heretoiiore in diaphragm pumps the diaphragm has been flat or only with slight flexions thereof a comparatively large forcing power was obtained, and regularity in delivery was well-nigh impossible. Pumps have also been made with leather bellows, but these are not always reliable where exact similarity in the increments of fluid delivered for a given length of stroke is absolutely necessary, as for instance in the feeding of the combustible in oil engines. My invention is especially designed for this particular service, and permits the use of a comparatively long regulable stroke even though but very small amounts of liquid are to be forced. It further insures that even after quite long service the predetermined exact amount of Huid will be always delivered for a given length of stroke. To accomplish this desirable result, I employ a bellows-fold diaphragm made of thin resilient metal, which is compressed by a. lever actuated at regular intervals by t-he oil engine. The length of the stroke can be regulated by varying the throw of the lever in any one of several ways. The lever moves the diaphragm in one direction only, to effect the forcing of the fluid; the return suction stroke being due to the elasticity of the metal of which the diaphragm is composed.

The accompanying drawing is a sectional elevation of a pump embodying my improvements.

In the pump casing l are inserted the suction valve 2 and the discharge valve 3 which are pressed upon their seats by lthe springs 4. The supply pipe 5 is attached to a shouldered plug 6 inserted in a socket in the housing 7 for the valve 2, and pressed tightly slightly arched, so that even.

on its seat by a union 8. A simi-lar coupling 9 for the discharge pipe 10 is Secured by :a gland l1. Communicating with one end of the pump casing is the bellows-like diaphragm 1.2, composed of resilient metal, and having a pluralty of folds of comparatively small diameter so that the structure is rather long and narrow. The closed end of the diaphragm rests upon one end of a lever 13 suitably fulcrumed on the pivot 14. The opposite.v end of said lever stands in line with a regularly reciprocating part of the engine, such for instance asthe plunger rod 1 en said rod is at one end of its stroke, it is at a sufficient lever to permit the latter the purpose of varyin quently regulating tE ejected at each stroke of the pump. While any suitable adjusting device may be used, I prefer to place an eccentric 16 under the arm 17 of the lever, and provide an arm 18 on the shaft of said eccentric whereby the latter can be turned, either by hand or by the governor of the engine. When the eccentric is adjusted by hand, it will be held fast in the desired position by suitable means.

The operation is as follows: The eccentric 16 is set to aiford more or less lost motion between the plunger 15 and the lever 13, so that only a predetermined portion of the constant stroke of said plunger will be effective to compress the bellows-like diaphragm 12. At each such compression, an exact quantity of fluid will be forced outI of the pump casing 1 through the discharge valve 3 and ipe 10. When the plunger recedes from tie lever the resilience of the diaphragm 12 forces the lever back to its original position and at the same time sucks a fresh supply of Huid through the valve 2 into the pump casing. The quantity of fluid sucked in and discharged at each stroke of the pump can be varied by adjusting the position of the eccentric 16, assuming an unvarying stroke of the plunger 15.

In accordance with the provisions of the patent statutes, I have described the principle of operation of my invention, together with the apparatus which I now consider to represent the best embodiment thereof; but I desire to have it understood that the distance from the to be adjusted for its throw and consee quantity of fluid apparatus shown is only illustrative, and that the invention can be carried out by other means.

Vhat I claim as new and desire to secure by Letters Patent of the United States, is,-

l. A pump for delivering small quantities of fluid, comprising acasing, suction and discharge valves, a long and narrow bellows-like diaphragm `of resilient metal connected with said casing and tightly closed at one end, a lever bearing loosely against the closed end of said diaphragm, and a reciprocating member having a constant stroke and acting upon the free end of said lever.

2. A pump for delivering small quantities of fluid, comprising a casing, suction and discharge valves, a bellows-like metallic diaphragm connected with said casing, a lever bearing against the closed end of said diaphragm, means for lregulating the stroke of said lever, and a constant-stroke member acting on the free end of said lever.

8. A pump fordelivering small quantities of fluid, comprising a casing, suction and discharge valves, a bellows-like diaphragm of resilient metal connected with one end of said casing, a lever bearing against the closed end of said diaphragm, an eccentric for regulating the throw of said lever, and a reciprocating plunger of constant stroke cooperating With said lever.

4. In a pump, the combination of .a casing, suction and discharge valves mounted therein, a bellows-like metallic diaphragm that is connected to and supported by the casing, a lever arranged to be vibrated on its pivot to compress the diaphragmv and force fluid through the discharge valve, a device having a constant length of stroke for ,actuating the lever, and a regulator for the pump which limits the expansion movement of the diaphragm and the arc of movement of the lever.

VIn Witness whereof, I have hereunto set my hand.

KARL STEINBECKER.

Witnesses GEO. MIBERLE, GUsT HILLBRocK. 

